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useful. alpha version, preview version, beta version - Alpha version describes a development status that usually means the first complete version of a program or application, which is most likely unstable, but is useful to show what the product will do to, usually, a selected group—and is also called preview version; the beta version is usually the last version before wide release, often .... Explore the world of LEGO® through games, videos, products and more! Shop awesome LEGO® building toys and brick sets and find the perfect gift for your kid.